Table 3. Apparent ileal digestibility (AID) and apparent total tract digestibility (ATTD) of weaned pigs fed diets with positive control (PC), negative control (NC), and NC + 0.02% dietary protease (PRO) supplementation diets¹⁾

Items	Dietary treatment²⁾			SEM	p-value
Items	PC	NC	PRO	SEM	Diet
AID
Dry matter (%)	79.64^a	75.82^b	79.18^a	0.45	< 0.05
Crude protein (%)	75.17^a	72.37^b	76.28^a	0.36	< 0.05
Energy (%)	80.89^a	76.89^b	79.65^a	0.43	< 0.05
ATTD
Dry matter (%)	86.48	85.89	86.52	0.46	0.565
Crude protein (%)	83.79^a	82.72^b	84.11^a	0.19	< 0.05
Energy (%)	88.51	87.28	88.26	0.49	0.215

Each value is the mean of 5 replicates (6 pigs per pen).
PC, CP = 22.36% (phase2); NC, 0.61% less CP than PC.
Means with different letters represent statistical significance (p < 0.05).